Quote:
Originally posted by vtecmansi
hey all. i got a code 45 on my civic si twice now. its a system too lean/rich prob. i have an aem fuel pressure reg. could running too much fuel pressure make it run too rich??? i have it set at 48-50 psi. is that too much with an intake, intake manifold, header, and exhaust?!?! if anybody has had this prob please gimmeee some info.
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Get rid of the AEM FPR, and reinstall your stock one. Those mods aren't enough to need to change your fuel settings. You're ECU will compensate for it.